Satellite Interpretation Message
Issued by NWS Tiyan, Guam

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618
ATPQ40 PGUM 241540
SIMGUM

SATELLITE INTERPRETATION MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
140 AM CHST MON SEP 25 2017

WESTERN NORTH PACIFIC BETWEEN THE EQUATOR AND 25N FROM 130E TO 180.

A WEAK CIRCULATION IS LOCATED SOUTHWEST OF PALAU NEAR 5N130E. A
SURFACE TROUGH EXTENDS FROM THE CIRCULATION TO 19N140E. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS ARE LOCATED IN SOUTHWESTWERN YAP
STATE AND NORTH AND EAST OF PALAU BETWEEN THE EQUATOR AND 8N FROM
135E TO 139E AND BETWEEN 10N AND 18N FROM 135E TO 141E. A SECOND
TROUGH EXTENDS FROM THE CIRCULATION TO NEAR 19N133E AND IS GENERATING
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS NORTHWEST OF PALAU
BETWEEN 10N AND 20N FROM 130E TO 135E.

AN UPPER-LEVEL TROUGH EXTENDS FROM 13N152E THROUGH AN UPPER LOW NEAR
16N156E TO 20N165E AND CONTINUES TO BEYOND 180 AT 19N. UPPER-LEVEL
DIVERGENCE SOUTH OF THIS LOW AND TROUGH IS CREATING ISOLATED
THUNDERSTORMS EAST OF THE MARIANAS AND SOUTHWEST OF WAKE ISLAND
WITHIN 120 MILES OF A LINE FROM 17N148E TO 10N151E TO 16N163E.

ANOTHER SURFACE TROUGH EXTENDS FROM 1N158E TO 9N180 AND FARTHER
NORTHEAST. THIS TROUGH IS GENERATING SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS NEAR MAJURO AND SOUTH OF KOSRAE AND POHNPEI WITHIN 120
MILES OF A LINE FROM 3N155E TO 3N161E TO 7N180.

LOW-LEVEL CONVERGENCE IS PRODUCING SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS IN SOUTHERN YAP STATE BETWEEN THE EQUATOR AND 8N FROM
142E TO 148E.

$$



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